Added RSpec matchers
Merge pull request #9 from fabn/matchers

Added RSpec matchers
:star: Add @fabn to the authors list
:station: Add ignores
:paperclip: Add MIT License
:+1: Test on travis under ruby 2.1
:wave: Move test helpers in their own source file
:muscle: Move rspec matchers under the Sanitize::Rails namespace cc:@fabn
:heart: Split components in different source files cc:@fabn,@damien
:newspaper: Clean up README
:surfer: DRY some requires in tests
:gem: Bump version to 0.9.0
:heart: More Readme :heart:
:blue_heart: Yet more README :heart: